초록 ▼

A folding bale spear system including a frame securable to a farm implement, particularly a tractor, left and right fork posts rotatable secured to the frame, left and right bale spears, one secured to the left fork post and one secured to the right fork post, and a system for rotation of the left a

A folding bale spear system including a frame securable to a farm implement, particularly a tractor, left and right fork posts rotatable secured to the frame, left and right bale spears, one secured to the left fork post and one secured to the right fork post, and a system for rotation of the left and right fork posts about the frame such that in an open position, the bale spears are extended rearwardly from the frame, and in a closed position the bale spears cross each other and are rotated to a position substantially parallel to the frame.

대표청구항 ▼

1. A folding bale spear system comprising a frame mounted to the rear of a tractor,left and right fork posts, rotatably secured to the frame,left and right bale spears, one secured to the left fork post and one secured to the right fork post, wherein one of the bale spears is secured to one of the f

1. A folding bale spear system comprising a frame mounted to the rear of a tractor,left and right fork posts, rotatably secured to the frame,left and right bale spears, one secured to the left fork post and one secured to the right fork post, wherein one of the bale spears is secured to one of the fork posts in a position, when secured to the farm implement, which is located higher above the ground than the other bale spear, anda means for rotation of the left and right fork posts, which means is secured to the fork posts, such that in an open position, the bale spears are extended rearwardly from the frame and, in a closed position, the bale spears are rotated to cross each other to a position substantially parallel to the frame,wherein the means for rotation of the fork posts comprises a hydraulic cylinder secured between the fork posts and attachable to an hydraulic system of the tractor,wherein the frame comprises a pair of vertical frame members, to which the left and right fork posts are rotatably secured, and a horizontal frame member secured between the pair of vertical frame members,wherein a pair of fork pins rotatably secure the left and right fork posts to the pair of vertical frame members,wherein the left and right fork posts comprise a pair of pin rail bushings, andwherein the vertical frame members further comprise a second pair of pin rail bushings which operate in coordination with the fork pins such that the fork posts can rotate at least 60 degrees in rotation about the fork pins when rotated by the rotation means. 2. The folding bale spear system of claim 1, wherein the hydraulic cylinder rotates both the left and right fork posts simultaneously such that the left and right bale spears are moved from a substantially parallel position with respect to the frame to a position substantially vertical to the frame. 3. The folding bale spear system of claim 1, wherein the hydraulic cylinder is secured to a pair of hydraulic plates which plates are secured to a top of the left and right fork posts. 4. The folding bale spear system of claim 1, wherein the frame further comprises a pair of side rails, one secured to each of the fork posts. 5. The folding bale spear system of claim 4, wherein the frame is secured to the farm implement by attachment of the farm implement to each of the side rails. 6. The folding bale spear system of claim 1 further comprising a bypass valve secured to the hydraulic system of the farm implement, which regulates the pressure sent to the hydraulic cylinder. 7. A folding bale spear system comprising a frame mounted to the rear of a tractor,left and right fork posts, rotatably secured to the frame,left and right bale spears, one secured to the left fork post and one secured to the right fork post, wherein one of the bale spears is secured to one of the fork posts in a position, when secured to the farm implement, which is located higher above the ground than the other bale spear, anda means for rotation of the left and right fork posts, which means is secured to the fork posts, such that in an open position, the bale spears are extended rearwardly from the frame and, in a closed position, the bale spears are rotated to cross each other to a position substantially not shown parallel to the frame,wherein the means for rotation of the fork posts comprises a spring secured between the left and right fork posts,wherein the frame comprises a pair of vertical frame members, to which the left and right fork posts are rotatably secured, and a horizontal frame member secured between the pair of vertical frame members,wherein a pair of fork pins rotatably secure the left and right fork posts to the pair of vertical frame members,wherein the left and right fork posts comprise a pair of pin rail bushings, andwherein the vertical frame members further comprise a second pair of pin rail bushings which operate in coordination with the fork pins such that the fork posts can rotate at least 60 degrees in rotation about the fork pins when rotated by the rotation means.